From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754788AbaD1KJZ (ORCPT ); Mon, 28 Apr 2014 06:09:25 -0400 Received: from mail-we0-f169.google.com ([74.125.82.169]:60636 "EHLO mail-we0-f169.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754559AbaD1KJW (ORCPT ); Mon, 28 Apr 2014 06:09:22 -0400 Message-ID: <535E28D0.7050502@linaro.org> Date: Mon, 28 Apr 2014 12:09:20 +0200 From: Daniel Lezcano User-Agent: Mozilla/5.0 (X11; Linux i686; rv:24.0) Gecko/20100101 Thunderbird/24.3.0 MIME-Version: 1.0 To: Peter Zijlstra CC: "Rafael J. Wysocki" , Amit Kucheria , Ingo Molnar , Lists linaro-kernel , Linux PM list , Linux Kernel Mailing List Subject: Re: [PATCH 2/3] sched: idle: Add sched balance option References: <1398342291-16322-1-git-send-email-daniel.lezcano@linaro.org> <535911DC.9050109@linaro.org> <2713863.BLQTYQm2Oa@vostro.rjw.lan> <20140425132055.GC11096@twins.programming.kicks-ass.net> <535A94E3.5080004@linaro.org> <20140425184327.GH26782@laptop.programming.kicks-ass.net> In-Reply-To: <20140425184327.GH26782@laptop.programming.kicks-ass.net> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 04/25/2014 08:43 PM, Peter Zijlstra wrote: > On Fri, Apr 25, 2014 at 07:01:23PM +0200, Daniel Lezcano wrote: >> As the sysctl is some kind of ABI, I would like to make sure we reach a >> consensus and discuss a bit about that. > > We could make it a sysfs file, like /sys/power/state, which when read > provides the words it takes. > > That is more flexible than a numeric sysctl for which we have to keep an > enumeration. I agree a numerical value is not flexible. But it sounds weird to put a scheduler option in the sysfs and maybe more options will follow. I am wondering if we shouldn't create a new cgroup for 'energy' and put everything in there. So we will have more flexibility for extension and we will be able to create a group of tasks for performance and a group of tasks for energy saving. Does it make sense ? -- Linaro.org │ Open source software for ARM SoCs Follow Linaro: Facebook | Twitter | Blog